the following points form a quadratic relationship: (1, 5.0) (2, 4.4) (3, 4.3) (4, 4.2) (5, 4.6) (6, 4.8) (7, 5.4) (8, 6.2). The x coordinates are years a company has been in operation and the y coordinates are profit in millions for that ysar. Use quadratic regression to determine profit in the 4 th year. A) 6.5 million B) 4.28 million C ) 4.35 million D)4.20 million
Since the x-coordinate is the number of years a company I has been in operation, where x = 4 would be the 4th year. That point is given explicitly, no quadratic regression necessary. It corresponds to the y-coordinate 4.2 which is profit in millions. So, the answer should be D, 4.2 million.